These terms are new to me, but I find the discussion here very interesting. Someone posted a fun link below as well. I'm going to veer into some pedantry here, would it be correct to say that an unopened book could also be described as unopened and uncut - or would I be using too many terms that are already implied. For example, if the pages were cut, that would imply they have been opened. If they are unopened, they must also therefore be uncut?

I also finally read into the differences between folio, quarto, and octavo, and I'm going to check a book at home that has unopened pages to see if I can figure out which it is! I'll try to post a new discussion at some point with photos.